第29题: [单项选择]关于脊髓γ运动神经元的叙述，下列哪项正确（） A. 为脊髓内的大型细胞 B. 其轴突支配梭外肌 C. 兴奋时对α运动神经元有抑制作用 D. 其作用与肌张力的调节有关 E. 接受Renshaw细胞的轴突 参考答案:D
第30题: [单项选择]The children the Council ran buses for in the past were those ______. A. whose parents were worried about them B. who would have had to walk otherwise C. who could not walk D. who had to travel a long way 参考答案:D 答案解析:根据文章第二段的第一句可知答案为[D]。迄今为止(即过去)，郡议会(the County Council)只为那些家离学校超过三英里的孩子们或有特殊原因的孩子们提供公共汽车的服务。
